Metso 5300, Installation Maintenance And Operating Instructions, Page: 4 / 12

13. Remove the seat (5) from the body (1) and body cap
(2) using the proper disassembly method for that type
seat as follows:
A. 316SS/Filled TFE Metal Wrapped Seats,
DIGESTER BLOW VALVES:
Remove the seats by first chipping and grinding away the
tack welds that are holding the seat (5) in its cavity on the
side opposite the seat retainer (See Figure 1). Lift the seat
from the cavity and remove as shown in Figure 1. Repeat
procedure for second seat.
B. Filled TFE Seats,
REACTOR DISCHARGE VALVES
Remove the seats by first rotating the seat so that the large
notch that is cut on the outside diameter of the seat lines
up with one of the seat retainers (See Figure 2). Lift the seat
from the cavity and remove it as shown in Figure 2. Repeat
procedure for second seat.
NOTE: If the seat is cemented in its cavity by pipeline
media, it may be cut and removed using extreme caution
not to damage the metal sealing surface in the seat cavity.
3.3 Assembly
NOTE: If necessary seats, seals and bearings can be
lubricated with a lubricant compatible with the media.
1. Place the body (1) and the body cap (2) in a vertical
position with the body joint facing upward. Assemble
a seat (5) in the body and body cap using the proper
assembly method for that type seat as follows:
A. 316SS/Filled TFE Metal Wrapped Seats:
Insert a seat (5) by sliding one side under the seat
retainer and dropping the seat into the cavity, see
Figure 1. Seat is then tack welded in three places
opposite the seat retainer as shown in Figure 1. Repeat
the procedure for the second seat.
B. Filled TFE Seats:
Insert a seat (5) by sliding one side under one seat
retainer and aligning the notch on the outside diameter
of the seat with the opposite seat retainer. Drop the
seat into the cavity so that the notch passes over the
seat retainer (See Figure 2). Rotate seat 90° so that it is
locked in place. Repeat procedure for the second seat.
2. Insert a trunnion bearing (27) into each trunnion plate
(26) counterbore.
3. Place a bearing spacer (28) over each ball trunnion.
Repair kits contain two types of spacers (28). Choose
the proper bearing spacer (28) per Figure 5.
4. Fit a trunnion plate over each ball trunnion until
the plate rests against the bearing spacer (28). This
operation must be performed with care and without
excessive force or the bearings may be damaged. The
DIGESTER BLOW VALVES
Figure 1
REACTOR DISCHARGE VALVES
Figure 2
Tack Welds
Seat
Seat
Seat Retainer
Seat Retainer
Metal Wrapper
Notch on Seat in
Locked Position
Notch on Seat in
Unlocked Position
IMO 11/17
4 IMO-302 EN